Structure of the NiFe2O4(001) surface in contact with gaseous O2 and water vapor

Xiao Shi, Ye Fei Li, Steve L. Bernasek, Annabella Selloni

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Nickel ferrite, NiFe2O4, is a material with interesting physical properties and useful technological applications. We have used Density-functional theory with on-site Coulomb repulsion U term to study the structure, electronic properties, and energetics of the NiFe2O4(001) surface and its interaction with water both in the absence and in the presence of surface oxygen vacancies. In a humid environment, water adsorbs dissociatively on the surface oxygen vacancies leading to the formation of surface hydroxyls. At high temperature, water desorbs leaving a surface containing oxygen vacancies. These defects could represent useful reactive sites for various catalytic reactions.

Original languageEnglish (US)
Pages (from-to)73-79
Number of pages7
JournalSurface Science
Volume640
DOIs
StatePublished - 2015

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Keywords

  • DFT calculations
  • Oxygen vacancies
  • Water adsorption

Fingerprint Dive into the research topics of 'Structure of the NiFe<sub>2</sub>O<sub>4</sub>(001) surface in contact with gaseous O<sub>2</sub> and water vapor'. Together they form a unique fingerprint.

  • Cite this